In other words, the tools you get inside of games themselves to make your own content has grown far beyond the level and map editors in titles like Age of Empires.
Now, it’s to the point where Media Molecule comes out with a new title that is essentially a game where you create games (but without all of the variables and the programming/tool knowledge needed when working with something like Unity). It does not provide as much flexibility or as much raw power as a game engine, but for kids and gamers in generals, this will be an amazing experience that could introduce them to the concept.
From what is known so far, it contains kid/gamer friendly tools for modeling, level building, and sound/music creation. It is amazing what young people have these days, being able to buy a 60 dollar title from the local store to create, with a controller, a world that took a lot of skill, effort and time with ultra-expensive software until about 15 years ago. By all means it’s still a toy and you won’t be seeing titles made with this on Steam, but it makes the level editors I worked with as a child look restrictive and boring. CG and all of its aspects is, little by little, being unlocked for nearly all ages and skill levels.